I trimmed the top of my ab edge to 5mm and the chest piece I left about 10mm on the bottom edge, some trim off more. I used a bit of heat on the sides of the shins while holding them close to relieve the springing out, the trick while putting them on is to open them and guide them over you ankle, your foot doesn't go through them.
In the picture above I glued the front velcro to the blue cover strip, this allows those with larger calves to have a bigger cover strip